SAP Message RSRV063 - Internal error: Class &1 does not implement interface IF_RSRV_ATOM

Diagnosis
This is an internal error in the test environment. Notify SAP Portalsof this error.
Class &V1& that implements an elementary test, does not implement theIF_RSRV_ATOM interface. The elementary test cannot be carriedout. There is probably an inconsistency in the internal testdescription.